Creating a branch in SVN results in a rev. being generated. However, I don't believe any new branch was created for 2.0 (i.e. they used the existing stable branch).

There should be a revision under the "stable" branch that aligns with the 2.0 release, unfortunately since it doesn't look as though the release revision was placed under a "tags" branch it's difficult to identify which revision lines up with the release.

You're best bet, until someone with more knowledge checks in here would be to pull a revision from the "stable" branch closest to the date stamp on the 2.0 release. That would appear to be r5350.